A083721 - cp's OEIS frontend

A083721 Number of primes greater than the greatest prime factor of n but not greater than n.

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	3
9	2
10	1
11	0
12	3
13	0
14	2
15	3
16	5
17	0
18	5
19	0
20	5
21	4
22	3
23	0
24	7
25	6
26	3
27	7
28	5
29	0
30	7
31	0
32	10
33	6
34	4
35	7
36	9
37	0
38	4
39	6
40	9
41	0
42	9
43	0
44	9
45	11
46	5
47	0
48	13
49	11
50	12
51	8
52	9
53	0
54	14
55	11
56	12
57	8
58	6
59	0
60	14
61	0
62	7
63	14
64	17
65	12
66	13
67	0
68	12
69	10
70	15
71	0
72	18
73	0
74	9
75	18
76	13
77	16
78	15
79	0
80	19
81	20
82	9
83	0
84	19
85	16
86	9
87	13
88	18
89	0
90	21
91	18

[0, 0, 0, 1, 0, 1, 0, 3, 2, 1, 0, 3, 0, 2, 3, 5, 0, 5, 0, 5, 4, 3, 0, 7, 6, 3, 7, 5, 0, 7, 0, 10, 6, 4, 7, 9, 0, 4, 6, 9, 0, 9, 0, 9, 11, 5, 0, 13, 11, 12, 8, 9, 0, 14, 11, 12, 8, 6, 0, 14, 0, 7, 14, 17, 12, 13, 0, 12, 10, 15, 0, 18, 0, 9, 18, 13, 16, 15, 0, 19, 20, 9, 0, 19, 16, 9, 13, 18, 0, 21, 18]

cp's OEIS Frontend

A083721 Number of primes greater than the greatest prime factor of n but not greater than n.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	3
9	2
10	1
11	0
12	3
13	0
14	2
15	3
16	5
17	0
18	5
19	0
20	5
21	4
22	3
23	0
24	7
25	6
26	3
27	7
28	5
29	0
30	7
31	0
32	10
33	6
34	4
35	7
36	9
37	0
38	4
39	6
40	9
41	0
42	9
43	0
44	9
45	11
46	5
47	0
48	13
49	11
50	12
51	8
52	9
53	0
54	14
55	11
56	12
57	8
58	6
59	0
60	14
61	0
62	7
63	14
64	17
65	12
66	13
67	0
68	12
69	10
70	15
71	0
72	18
73	0
74	9
75	18
76	13
77	16
78	15
79	0
80	19
81	20
82	9
83	0
84	19
85	16
86	9
87	13
88	18
89	0
90	21
91	18

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	3
9	2
10	1
11	0
12	3
13	0
14	2
15	3
16	5
17	0
18	5
19	0
20	5
21	4
22	3
23	0
24	7
25	6
26	3
27	7
28	5
29	0
30	7
31	0
32	10
33	6
34	4
35	7
36	9
37	0
38	4
39	6
40	9
41	0
42	9
43	0
44	9
45	11
46	5
47	0
48	13
49	11
50	12
51	8
52	9
53	0
54	14
55	11
56	12
57	8
58	6
59	0
60	14
61	0
62	7
63	14
64	17
65	12
66	13
67	0
68	12
69	10
70	15
71	0
72	18
73	0
74	9
75	18
76	13
77	16
78	15
79	0
80	19
81	20
82	9
83	0
84	19
85	16
86	9
87	13
88	18
89	0
90	21
91	18

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	3
9	2
10	1
11	0
12	3
13	0
14	2
15	3
16	5
17	0
18	5
19	0
20	5
21	4
22	3
23	0
24	7
25	6
26	3
27	7
28	5
29	0
30	7
31	0
32	10
33	6
34	4
35	7
36	9
37	0
38	4
39	6
40	9
41	0
42	9
43	0
44	9
45	11
46	5
47	0
48	13
49	11
50	12
51	8
52	9
53	0
54	14
55	11
56	12
57	8
58	6
59	0
60	14
61	0
62	7
63	14
64	17
65	12
66	13
67	0
68	12
69	10
70	15
71	0
72	18
73	0
74	9
75	18
76	13
77	16
78	15
79	0
80	19
81	20
82	9
83	0
84	19
85	16
86	9
87	13
88	18
89	0
90	21
91	18